Research Article
MEMS Inertial Sensor for Strata Stability Monitoring in Underground Mining: An Experimental Study
Table 1
Mechanical properties of rocks near coal seam.
| Stratum | Parameter | Thickness h (m) | Poisson’s ratio () | Compressive strength (MPa) | Tensile strength (MPa) | Elastic modulus (GPa) | Density (kg/m3) |
| … | 170 | - | - | - | - | - | Gritstone | 3.3 | 0.27 | 65 | 4.60 | 5.5 | 2580 | Siltstone | 2.6 | 0.30 | 72 | 7.50 | 9.0 | 2400 | Sandy mudstone | 3.1 | 0.25 | 26 | 1.80 | 3.5 | 2440 | Mudstone | 2.2 | 0.44 | 19 | 0.17 | 1.7 | 2660 | Coal seam | 3.6 | 0.26 | 14 | 0.06 | 1.2 | 1540 | Mudstone | 2.5 | 0.44 | 19 | 0.17 | 1.7 | 2660 | … | - | - | - | - | - | - |
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